My first thought was the book "Adoration Quilts" by Rachel W N Brown, I have this book and love it. Look at this page and see some of the projects, including the mantel pattern.
I also found these when I searched for Mantel Quilt, also see them called Mantle Skirts.
I found this one with snowmen:
http://www.hgtv.com/crafting/winter-...ilt/index.html
Santa & his sleigh:
http://home-and-garden.webshots.com/...55106402UHgOIP
a variety of mantel quilts:
http://stitchesfromhome.net/STITCHES...ME/mantle.html
Electric quilt:
http://www.electricquilt.com/Albums/05/0509/0509p1.asp
acorn and fall leaves:
http://fiberworks-heine.com/catalog/...9a520434a98470
cute cats:
http://www.rozemaryn.com/MantleQuilt.htm
a simple nativity mantel quilt:
http://www.chiseledincloth.com/blog/?p=720
fan pattern:
http://home.howstuffworks.com/quilte...t-patterns.htm